[ethPM] Update deployments to work when only abi available#1417

Merged

njgheorghita merged 1 commit intoethereum:masterfrom njgheorghita:ethpm-deployments-refactor

Aug 10, 2019

+26-62

Commits on Aug 9, 2019

Update deployments.get_instance to work with only abi available
njgheorghita
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